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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
| Published: |
2026
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2601.14785 |
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| _version_ | 1866910114600976384 |
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| author | Li, Xin Guo, Sen Wang, Pei Liang, En-Wei Deng, Huan Liang, Yu Zeng, Xiao-Xiong Lin, Kai Jiang, Qing-Quan |
| author_facet | Li, Xin Guo, Sen Wang, Pei Liang, En-Wei Deng, Huan Liang, Yu Zeng, Xiao-Xiong Lin, Kai Jiang, Qing-Quan |
| contents | In this analysis, we investigate the polarization radiation imaging of Kerr-Newman black holes, with a particular focus on the impact of black hole charge on photon propagation and polarization characteristics. By extending the traditional Walker-Penrose method, which is limited by its reliance on specific symmetric structures and Killing tensors, we overcome these limitations by constructing an ordinary differential equations (ODEs) numerical framework that combines the photon orbit equation with the polarization parallel transport equation. This allows for the self-consistent evolution of photon trajectories and polarization states in any spacetime backgrounds without relying on specific symmetries. Using this framework, we analyze the effects of black hole spin and charge on the polarization characteristics of radiation from both prograde and retrograde accretion disks. Our results show that black hole charge can significantly modify photon trajectories and polarization patterns: increasing charge compresses and distorts the EVPA structure on photon-ring scales, inducing localized rotations and asymmetries that may provide a potential diagnostic of a nonzero black hole charge. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_14785 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Polarized Radiative Transfer of Kerr-Newman Black Hole Li, Xin Guo, Sen Wang, Pei Liang, En-Wei Deng, Huan Liang, Yu Zeng, Xiao-Xiong Lin, Kai Jiang, Qing-Quan General Relativity and Quantum Cosmology In this analysis, we investigate the polarization radiation imaging of Kerr-Newman black holes, with a particular focus on the impact of black hole charge on photon propagation and polarization characteristics. By extending the traditional Walker-Penrose method, which is limited by its reliance on specific symmetric structures and Killing tensors, we overcome these limitations by constructing an ordinary differential equations (ODEs) numerical framework that combines the photon orbit equation with the polarization parallel transport equation. This allows for the self-consistent evolution of photon trajectories and polarization states in any spacetime backgrounds without relying on specific symmetries. Using this framework, we analyze the effects of black hole spin and charge on the polarization characteristics of radiation from both prograde and retrograde accretion disks. Our results show that black hole charge can significantly modify photon trajectories and polarization patterns: increasing charge compresses and distorts the EVPA structure on photon-ring scales, inducing localized rotations and asymmetries that may provide a potential diagnostic of a nonzero black hole charge. |
| title | Polarized Radiative Transfer of Kerr-Newman Black Hole |
| topic | General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2601.14785 |